KR101742674B1 - Lighting device - Google Patents

Abstract

An embodiment includes a heat dissipator having a flat surface on one side and a storage groove on the other side; A light source module unit disposed on the flat surface and in surface contact with the heat sink; A power source control unit disposed in the receiving groove to control power of the light source module unit; An inner case partially disposed in the accommodating groove to enclose the power control unit; And a socket portion connected to the inner case, wherein the socket portion has at least one screw thread on an outer surface of the inner case, and the socket portion has a screw groove corresponding to the screw thread on an inner surface thereof.

Description

LIGHTING DEVICE

An embodiment relates to a lighting device.

Light emitting diodes (LEDs) are a type of semiconductor devices that convert electrical energy into light. The light emitting diode has advantages of low power consumption, semi-permanent lifetime, fast response speed, safety, and environmental friendliness compared with conventional light sources such as fluorescent lamps and incandescent lamps. Therefore, much research has been conducted to replace conventional light sources with light emitting diodes. Light emitting diodes are increasingly used as light sources for various lamps used in indoor / outdoor, liquid crystal display devices, electric sign boards, streetlights, and the like .

Embodiments provide a lighting device that is easy to assemble.

A lighting device according to an embodiment includes a heat radiator having a flat surface on one side and a storage groove on the other side; A light source module unit disposed on the flat surface and in surface contact with the heat sink; A power supply controller inserted into the receiving groove to control power of the light source module; An inner case partially inserted into the receiving groove to enclose the power control unit; And a socket portion connected to the inner case, wherein the inner case has at least one screw thread on an outer surface of the inner case, and the socket portion has a thread groove corresponding to the thread on the inner side surface.

Embodiments can provide a lighting device that is easy to assemble.

The embodiment can provide an illumination device with improved heat dissipation characteristics through surface contact.

1 is a perspective view of a lighting apparatus according to an embodiment of the present invention.
2 is an exploded perspective view of a lighting device showing an embodiment according to the present invention.
3 is a cross-sectional view of a lighting apparatus showing an embodiment according to the present invention.
4 is a perspective view illustrating a light source module according to an embodiment of the present invention.
5 is a view for explaining a coupling structure of an inner case and a socket portion according to an embodiment of the present invention.
6A to 6H are views showing a process of assembling the lighting apparatus according to an embodiment of the present invention.

The thickness and size of each layer in the drawings are exaggerated, omitted, or schematically shown for convenience and clarity of explanation. Also, the size of each component does not entirely reflect the actual size.

In the description of the embodiment according to the present invention, in the case of being described as being formed "on or under" of each substrate, the upper (upper) or lower (lower) (on or under) all include that two identical substrates are directly contacted with each other or one or more other substrates are indirectly formed between the same substrates. Also, when expressed as above or below (on or under), it may include not only an upward direction but also a downward direction with respect to one substrate.

Hereinafter, a lighting apparatus according to an embodiment will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view of a lighting apparatus according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a lighting apparatus according to an embodiment of the present invention, and FIG. FIG. 4 is a perspective view illustrating a light source module according to an embodiment of the present invention. Referring to FIG.

1 to 4, the lighting apparatus 100 includes a cover unit 110, a light source module unit 130, a heat discharger 140, a power source control unit 150, and an inner case 160.

The cover 110 is disposed on the heat discharging body 140 while covering the light source module 130. The light emitted from the light source module 130 is reflected or refracted on the front surface or rear surface . The heat discharging body 140 is for emitting heat generated from the light source module unit 130 when the illuminating apparatus is driven and enhances heat radiation efficiency through possible surface contact with the light source module unit 130. At this time, the heat sink and the light source module part may be bonded by an adhesive agent, but preferably they are in surface contact with each other by using a structure such as a screw. The inner case 160 includes a power supply control unit 150 and is inserted into the heat discharging body.

Hereinafter, the illumination device 100 according to the embodiment will be described in detail with respect to each component.

<Cover part>

The cover portion 110 has a bulb shape having an opening G1 and the inner surface of the cover portion 110 is coated with a milky white paint. The coating material may include a diffusing material such that light when passing through the cover portion 110 is diffused on the inner surface of the cover portion.

Plastic, polypropylene (PP), polyethylene (PE), or the like is preferably used because the cover 110 can be made of glass, but has a weak impact on weight and external impact. It is more preferable to use polycarbonate (PC) having good light resistance, heat resistance and impact strength.

<Light source module section>

The light source module unit 130 includes a substrate 131 and a light source unit 133 disposed on the substrate. The light source unit 133 includes a light emitting device 133-1 and a lens unit 133-3.

The substrate 131 has a rectangular shape, but is not limited thereto. However, when the substrate 131 has a rectangular shape as in the embodiment, the substrate 131 has a hole 131a in the central region and a via hole 131b in the corner region. When the plurality of substrates 131 are disposed on a specific surface such as one surface of the heat discharging body 140, the via holes 131b serve as connection paths for wiring and connectors for electrically connecting with neighboring substrates.

The circuit board 131 may be a circuit pattern printed on an insulator. For example, a printed circuit board (PCB), a metal core PCB, a flexible PCB, a ceramic PCB, . In addition, a COB (Chips On Board) type that can directly bond an unpackaged LED chip on a printed circuit board can be used. In addition, the substrate 131 may be formed of a material that efficiently reflects light, or may be formed of a color whose surface is efficiently reflected, for example, white or silver.

A plurality of light emitting devices 133-1 may be disposed on one surface of the substrate 131. The light emitting devices 133-1 may be light emitting diode chips emitting red, green, and blue light, or light emitting diode chips emitting UV .

The light emitting diode may be a lateral type or a vertical type, and the light emitting diode may emit blue, red, yellow, or green.

The lens portion 133-3 is disposed on the substrate 131 so as to cover the light emitting element 133-1. The lens unit 133-3 adjusts the direction of light and the direction of light emitted from the light emitting device 133-1. At this time, the lens portion 133-3 is hemispherical type, and the interior of the lens portion 133-3 is entirely filled with a light transmitting resin such as silicone resin or epoxy resin. The light-transmitting resin may include a phosphor dispersed wholly or partially.

When the light emitting element 133-1 is a blue light emitting diode, the phosphor included in the light transmitting resin of the lens portion 133-3 may be a garnet system (YAG, TAG), a silicate system, a nitride system Nitrides, oxynitrides, and the like.

Natural light (white light) can be realized by including only a yellow phosphor in the translucent resin. However, a green phosphor or a red phosphor may be further included to improve the color rendering index and reduce the color temperature.

In addition, when various kinds of phosphors are mixed in the light-transmitting resin, the proportion of the phosphor to be added according to the color of the phosphor may be a green-based phosphor rather than a red-based phosphor and a yellow-based phosphor rather than a green-based phosphor.

YAG, silicate, and oxynitride systems of the garnet system may be used as the yellow phosphor, silicate system and oxynitride system may be used as the green system phosphor, and nitrides may be used as the red system phosphor. have.

A layer having a red-based phosphor, a layer having a green-based phosphor, and a layer having a yellow-based phosphor may be separately formed in addition to a mixture of various kinds of phosphors in the translucent resin.

<Heat radiator>

The heat discharging body 140 has a receiving groove 140a through which the power source control unit 150 and the inner case 160 are inserted. The heat discharging body 140 has a flat circular surface on which the light source module unit 130 is disposed and has an upper cylindrical portion 141 extending with respect to a center axis A of the circular surface, And a lower end cylindrical portion 143 extending from the lower end portion 141 to a diameter decreasing along the central axis A of the circular surface.

A seating groove 141-1 on which at least one or more light source module units can be placed may be formed on a flat surface of the upper cylindrical portion. The upper cylindrical portion 141 has a first hole 141a, a second hole 141b and a third hole 141c passing through the circular surface of the upper cylindrical portion 141.

The first screw 140a is inserted into the first hole 141a and the first screw 140a is passed through the coupling hole 160a disposed on the inner side of the inner case 160, And the inner case 160 are fastened together. A second screw 140b having passed through a hole 131a disposed at the center of the light source module unit 130 is inserted into the second hole 141b and the second screw 140b is inserted into the heat dissipation member 140, And the light source module unit 130 are brought into surface contact with each other. Accordingly, the heat generated in the light source module unit can be effectively transferred to the heat sink, thereby improving the heat radiation characteristics. The third hole 141c passes through the electrode pin 150a projected from the power source control unit 150 and is inserted into the via hole 131b of the light source module unit 130. [

The width of the circular surface of the upper cylindrical portion 141 or the height of the upper cylindrical portion 141 may vary according to the entire width of the light source module unit 130 or the overall length of the power control unit 150.

The upper cylindrical portion 141 has a plurality of pins 141-2 on its surface in the longitudinal direction of the upper cylindrical portion 141. [ The plurality of pins 141-2 are disposed radially along the surface of the upper cylindrical portion. The fin of the upper cylindrical portion 141 can increase the surface area and improve the heat radiation efficiency.

In the present embodiment, a plurality of pins are formed on the upper cylindrical portion 141, but a plurality of fins may be formed on the lower cylindrical surface 143 as in the shape of the upper cylindrical portion. That is, a plurality of fins formed on the surface of the upper cylindrical portion may extend to the lower cylindrical portion.

The heat dissipating unit 140 may be formed of a metal material or a resin material having excellent heat dissipation efficiency, but is not limited thereto. For example, the material of the heat discharging body 140 may include at least one of aluminum (Al), nickel (Ni), copper (Cu), silver (Ag), and tin (Sn).

Although not shown in the drawing, a heat sink may be disposed between the light source module unit 130 and the heat sink 140. The heat sink may be formed of a thermally conductive silicone pad or a thermally conductive tape having an excellent thermal conductivity. The heat generated by the light source module unit 130 may be effectively transferred to the heat sink 140.

&Lt; Power controller &

The power control unit 150 may include a support substrate 151 and a plurality of components 153 mounted on the support substrate 151. The plurality of components 153 may be, A DC converter for converting the supplied AC power into a DC power source, a driving chip for controlling driving of the light source module unit 130, an ESD (ElectroStatic discharge) protection device for protecting the light source module unit 130, and the like But is not limited to this.

The power supply control unit 150 includes an electrode pin 150a protruding from a circuit board connected to the support substrate 150. The electrode pin 150a includes a third hole 141c formed in the upper cylindrical portion of the heat dissipator 140, And is inserted into the via hole 131b of the light source module unit 130 to supply power to the light source module unit 130 from the power source control unit 150. [

<Inner case>

The inner case 160 may include an insertion portion 161 inserted into the receiving groove 140a of the heat discharging body 140 and a connecting portion 163 connected to the socket portion 170. [ The inner case 160 may be formed of a material having high insulation and durability, for example, a resin material.

The insertion portion 161 has a hollow cylindrical shape and a fastening hole 160a into which the screw is inserted is formed on the inner side of the insertion portion. The inserting portion 161 is inserted into the receiving groove 140a of the heat discharging body to prevent an electric short between the power control unit 150 and the heat discharging body 140 to improve the withstand voltage of the lighting apparatus 100 .

The guide portion 161a has a guide portion 161a protruding from the outer circumferential surface of the insert portion 161. When the insert portion 161 is inserted into the insert groove of the heat dissipator 140, And supports the side end of the receiving groove of the sieve. Therefore, a more stable coupling structure can be provided between the heat radiator and the inner case.

<Socket section>

The socket portion 170 is coupled to the connection portion 163 of the inner case 160 and is electrically connected to an external power source.

<Mechanism of the power supply control unit and internal case and electrical connection structure>

The power control unit 150 may be disposed in the receiving groove 151 of the heat discharging unit 140.

The support substrate 151 of the power supply control unit 150 may be disposed upright in a direction perpendicular to one surface of the substrate 131 in order to smoothly flow the air in the inner case 160. Therefore, compared with the case where the support substrate 151 is disposed in a horizontal direction with respect to one surface of the substrate 131, airflow caused by convection may occur in the interior case 160 in the upward and downward directions The heat radiation efficiency of the illumination device 100 can be improved. That is, the power control unit 150 is preferably disposed parallel to the longitudinal direction of the inner case 160.

Meanwhile, the supporting substrate 151 may be disposed in the inner case 160 in a direction perpendicular to the longitudinal direction of the inner case 160, but the present invention is not limited thereto.

The power control unit 150 may be electrically connected to the socket unit 170 and the light source module unit 130 by the electrode pins 150a and the first wires 150b.

Specifically, the first wiring 150b may be connected to the socket unit 170 to receive power from an external power source. The electrode pin 150a may pass through the third hole 141c of the heat discharging body 140 to electrically connect the power control unit 150 and the light source module unit 130 to each other.

5 is a view for explaining a coupling structure of an inner case and a socket portion according to an embodiment of the present invention.

As shown in the figure, the inner case 160 and the socket 170 are engaged with each other by screwing the socket part into the connection part of the inner case.

That is, a thread 163a is formed on the outer surface of the connection portion 163 of the inner case, and a thread groove 170a corresponding to the thread is formed on the inner side surface of the socket portion 170, Respectively.

Of course, a thread groove may be formed on the outer surface of the connection portion 163 of the inner case, and a thread may be formed on the inner surface of the socket portion 170 correspondingly.

At this time, the diameter d1 of the connection portion 163 of the inner case is smaller than the diameter d2 of the insertion portion 161 of the inner case. The diameter d3 of the socket portion 170 is smaller than the diameter d2 of the insertion portion 161 of the inner case. The reason why the diameter of the connecting portion or the socket portion of the inner case is smaller than that of the inserting portion of the inner case is to have a shape that can replace the conventional lighting device.

5, the inner case includes the insertion portion 161 and the connection portion 163 that is smaller than the diameter of the insertion portion. However, the insertion portion and the connection portion may be formed as one body with the same diameter, Or a screw groove may be formed to engage with the socket portion.

Such a structure improves the assemblability of the lighting apparatus and is advantageous for repairing the structure such as the power supply control unit installed in the inner case.

6A to 6H are views showing a process of assembling the lighting apparatus according to an embodiment of the present invention.

First, as shown in FIG. 6A, the power control unit 150 is coupled to the insertion unit 161 of the inner case 160. At this time, though not shown in the drawing, the guider groove is formed on the inner surface of the inner case so that the support substrate 151 of the power supply control unit 150 can be coupled to the inner surface of the inner case 160 in a sliding manner, Direction.

6B, the electrode pin 150a of the power supply control unit disposed in the insertion portion 161 of the inner case is stably fixed and electrically coupled to the light source module unit 130, Is positioned at the end of the inner case 160 to seal the inner case. The holder 155 is formed with a protrusion 155a having a through hole on one surface thereof so that the electrode pin 150a can penetrate through the protrusion 155a. When the holder closes the inner case, the heat sink 140 and the inner case 160, An auxiliary hole 155b for passing the first screw 140a for fastening the first screw 140a is formed in the holder outer area. The holder is a means for stably fixing and supporting the electrode pin, and can be omitted if necessary.

Next, as shown in FIG. 6C, the assembly of the inner case and the power source control unit is fastened by the heat dissipator 140 and the first screw 140a. At this time, the electrode pin 150a of the power control unit protrudes through the third hole 141c of the heat discharging body.

Next, as shown in FIG. 6D, the socket portion 170 is press-coupled with the connection portion 163 of the inner case. At this time, the power control unit and the socket unit disposed in the inner case are electrically connected.

Next, as shown in FIG. 6E, a heat dissipation grease (135) is applied to the lower surface of the prepared light source module unit 130. The light source module unit 130 has a plurality of light source units 133 and is disposed on the substrate 131 so as to be symmetrical with respect to the center axis A passing through the holes 131a disposed at the center of the substrate 131 . Specifically, it is disposed on the substrate 131 so as to be symmetrical with respect to the center axis A passing through the hole 131a disposed at the central portion of the substrate 131. Of course, the light source 133 may be arranged in various forms on the substrate, but it is preferably arranged symmetrically with respect to the central axis in order to improve the uniformity of light emitted from the light source 133.

6f, the assembly including the inner case 160, the power source control unit 150, and the heat discharger 140 and the light source module unit 130 are fastened by the second screw 140b. At this time, the second screw fastens the assembly and the light source module unit through the hole 131a formed in the central region of the light source module unit 130 and the second hole 141b formed on the upper surface of the heat sink.

Next, as shown in FIG. 6G, the connector 135 is coupled through the via-hole of the light source module so as to be electrically connected between the light source modules. At this time, the electrode pin 150a of the power control unit is soldered to be electrically connected to the substrate 131 of the light source module unit.

Next, as shown in FIG. 6H, the cover unit 110 is coupled with the heat discharging body 140 through silicon bonding to cover the light source module unit 130 on the heat radiating body, thereby completing the lighting apparatus.

Since the illumination device 100 is structurally capable of replacing the conventional array light bulb, it is possible to use a conventional arrangement light bulb without any mechanical connection structure or assembly improvement according to the new illumination device There are advantages.

The features, structures, effects and the like described in the embodiments are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects and the like illustrated in the embodiments can be combined and modified by other persons skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of illustration, It can be seen that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

110:
130: Light source module section
140:
150:
160: inner case

Claims (9)

A heat dissipater having a flat surface on one side and a storage groove on the other side;
First and second light source module units disposed on the flat surface and including a substrate having first via holes and second via holes and a plurality of light source portions disposed on the substrate;
A power control unit disposed in the receiving groove and including an electrode pin electrically connected to the first via hole of the first light source module unit and the first via hole of the second light source module unit;
An inner case partially disposed in the storage groove and surrounding the power control section;
A socket unit connected to the inner case and electrically connected to the power control unit; And
And a connector electrically connecting the second via hole of the first light source module unit and the second via hole of the second light source module unit. The method according to claim 1,
Wherein the inner case includes an insertion portion disposed in a receiving groove of the heat discharging body and a connecting portion extending from the insertion portion and connected to the socket portion,
Wherein the socket portion has a screw groove on the inner side,
And the connecting portion has a screw thread corresponding to the screw groove on the outer surface so as to engage with the socket portion. The method according to claim 1,
Wherein the heat discharging body includes an upper cylindrical portion and a lower cylindrical portion,
Wherein the upper cylindrical portion has at least one hole into which at least one screw is inserted,
Wherein the at least one screw is in surface contact with the heat discharging body and the light source module unit. delete 3. The method of claim 2,
Further comprising a guide portion protruding from an outer circumferential surface of the insertion portion of the inner case,
And the guide portion supports the side end of the receiving groove of the heat discharging body. delete delete The method according to claim 1,
Wherein a flat surface of the heat dissipator has a first seating groove in which the first light source module is disposed and a second seating groove in which the second light source module is disposed,
And the first seating groove and the second seating groove are partially connected to each other. The method according to claim 1,
The substrate having a hole,
A hole in the substrate is disposed in a central portion of the substrate,
Wherein the plurality of light sources are symmetrically arranged with respect to a hole of the substrate.

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